Direct Lightning Strike Test Program
Direct lightning strike testing is a crucial part of aircraft design and qualification. Manufacturers must ensure that critical components like flight control surfaces and fuel tanks can withstand the effects of a lightning strike to avoid catastrophic failures.
This is especially true for the newest aircraft designs, where increased dependence on composite materials has made them more vulnerable to lightning strike. As a result, test standards have evolved and become more stringent. To ensure product safety, there are two major types of validation: direct strike and indirect strike testing.
Direct Lightning Strike Testing
As the name suggests, direct lightning strike testing simulates the effects of a direct hit on aircraft or ground-based structures. Using high-powered equipment, we can test exterior materials and interior components to assess for weak areas and ensure continued performance. As the only commercially available provider of direct lightning strike testing in the UK, we provide design support, consulting and testing from start to finish.
Aircraft Lightning Strike Testing Methods
There are a variety of lightning strike test methods available, depending on the type of product being tested and the conditions being simulated. An accredited test lab can help you determine which methods will provide maximum value to your test program.Some of the methods that we offer include:
RTCA DO-160 Section 23 Requirements
High Current Testing
Our equipment can create a lightning arc which can then replicate the effects of a lightning strike to an aircraft, both in terms of physical damage at the arc attachment location as well as looking how the current distributes through the fuel system and critical structural elements.
High Voltage Testing
Our equipment allows us to replicate the initial leader phase of a lightning strike which can stress dielectric materials such as antennas, radomes, and windscreens.
RTCA DO-160 Section 22 Requirements
We can test for all waveform methods and protection levels per RTCA DO-160 Section 22. For projects with unique or custom requirements, we have the flexibility to provide virtually any waveform transient, providing coverage for a wide range of products.
Pin Injection Testing
One of the most common test methods for assessing the effects of an indirect aircraft lightning strike, this method applies lighting transients directly into the pins of electrical products and systems to determine if it causes any damage.
Cable Bundle Testing
Cable bundle tests are designed to evaluate how the effects of current flowing on cable screens and overbraids effects equipment.There are several types of cable bundle testing: single stroke, multiple stroke, and multiple burst. The single stroke method replicates the effect of the initial return stroke current on equipment while the multiple stroke method replicates the effects of successive lightning attachments to an aircraft in a short duration. Multiple burst testing is designed to replicate the effects of leaders stepping away from the aircraft which can cause upset to equipment.
The increased use of composites in fuels tanks can lead to the accumulation of static. We test aircraft materials to determine if accumulated charge poses a threat to fuel tanks.
We can replicate the effects of charge accumulation on munitions due to handling or from carried by helicopter.
Design Support Services
Because an aircraft lightning strike can affect the integrity of every system on an aircraft, designing with protective features in mind is critical.
An important part of the design and qualification process of the avionics system is to understand the magnitude and types of transients. We use two methods, often in conjunction, to aid in design/qualification: Computational analysis to predict the Equipment Transient Design Level (ETDL) and full vehicle testing, at low current, to determine the Actual Transient Level (ATL).
Our testing services are fully compliant to sections 22 and 23 of RTCA DO-160, MIL-STD-461 and DEF STAN 59-411, making Element the UK’s sole provider of direct lightning strike testing.
For more information about our lightning strike services, speak to an expert today.
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